AP Statistics Final Review Project

Question 1

Which of the following statements about the Central Limit Theorem is true?

Accepted Answer

It states that any population can be approximated by a normal distribution.

Question 2

Central Limit Theorem states for a large enough sample size, the sampling distribution of the mean will be approximately

Accepted Answer

a) Normally distributed.

Question 3

If the slope of our regression equation is -0.23, what does this tell us about the r value of our model?

Accepted Answer

D. It is negative

Question 4

A 95% confidence interval estimate for the mean score on a math test is calculated to be (85, 90).

Accepted Answer

c) We are 95% confident that the true mean score lies between 85 and 90.

Question 5

A project shows the correlation between AP Stats grade and ACT score, you receive the report that the r value is 1.42

Accepted Answer

D. Find a new statistician

Question 6

I&#x27;m interested in comparing the average salaries of employees in three different departments within a company. Test?

Accepted Answer

d) Analysis of variance (ANOVA)

Question 7

What is the purpose of random assignment in an experiment?

Accepted Answer

B. To eliminate confounding variables

Question 8

Which of the following is an assumption for conducting a hypothesis test using a t-distribution?

Accepted Answer

The population is not normally distributed.

Question 9

Study conducted determining if there is an association between exercise frequency and weight loss. P value=0.02

Accepted Answer

d) statistically sig association between exercise frequency & weight loss.

Question 10

Which measure of center is most affected by extreme outliers?

Accepted Answer

A. Mean

Question 11

What does the standard deviation measure?

Accepted Answer

C. The spread or variability of the dataset

Question 12

What value from a computer output will tell us how strongly the points follow a linear correlation?

Accepted Answer

C. r-value

Question 13

In hypothesis testing, the Type I error is defined as:

Accepted Answer

a) Rejecting the null hypothesis when it is true.

Question 14

Which of the following is NOT an ethical consideration when conducting a statistical study?

Accepted Answer

D. Guaranteeing a desired outcome for the study

Question 15

The area under a probability density function represents the probability of a random variable falling within a certain _

Accepted Answer

Interval

Question 16

If the correlation coefficient between two variables is -0.75, which of the following is true?

Accepted Answer

The variables are negatively correlated.

Question 17

What is the main purpose of statistics?

Accepted Answer

C. To analyze and interpret data

Question 18

The distribution of a dataset is said to be skewed right if:

Accepted Answer

A. The right side of the distribution is longer or stretched out.

Question 19

A standard normal distribution has a mean of _______ and a standard deviation of _______.

Accepted Answer

0; 1

Question 20

If a random variable X follows a normal distribution with a mean of 50 and a STD of 10, what is the z-score for X = 70?

Accepted Answer

2

Question 21

Which of the following is an example of a voluntary response sample?

Accepted Answer

C. Asking for volunteers to participate in a study

Question 22

Is there a significant difference in the proportions of male and female voters who support a particular candidate.

Accepted Answer

b) Chi-square test

Question 23

Estimate the proportion of voters in a city who support a particular candidate. Which sampling method is best?

Accepted Answer

B. Stratified random sampling

Question 24

A discrete random variable can take on which of the following?

Accepted Answer

Only whole numbers

Question 25

What type of chart is best for summarizing two categorical variables?

Accepted Answer

A. Two-way table

Question 26

Which of the following is an example of qualitative data?

Accepted Answer

C. Eye color of individuals

Question 27

Study conducted determining significant difference in the mean scores of two groups. The p-value obtained was 0.08.

Accepted Answer

b) Fail to reject the null hypothesis.

Question 28

In a binomial distribution with n = 10 and p = 0.3, what is the probability of exactly 4 successes?

Accepted Answer

0.3810

Question 29

A survey asks individuals to rate a product on a scale from 1 to 5. What type of data is being collected?

Accepted Answer

C. Qualitative ordinal data

Question 30

What is the term for when a linear regression model gives us data within a certain range to make a prediction for an x

Accepted Answer

A. Extrapolation

Question 31

Average waiting time: 5 Random sample: 50 sample mean: 4.8 STD: 0.6 what is the null and alternate hypothesis

Accepted Answer

a) H0: μ = 5, Ha: μ ≠ 5

Question 32

Which of the following is not a part of describing a scatterplot?

Accepted Answer

C. Union

Question 33

What type of variable will we see along the x-axis of a scatterplot?

Accepted Answer

B. Explanatory Variable

Question 34

What does a positive residual value tell us?

Accepted Answer

B. Data value was higher than the prediction from linear regression model.

Question 35

When looking at a residual plot for a linear pattern, what should we see?

Accepted Answer

D. No apparent pattern

Question 36

In a standard normal distribution, what percentage of data falls within one standard deviation of the mean?

Accepted Answer

Approximately 68%

Question 37

Which probability distributions is characterized by a fixed number of trials & only 2 possible outcomes, success or fail

Accepted Answer

Binomial distribution

Question 38

In a linear regression model, which variable is predicted?

Accepted Answer

C. y-value

AP Statistics Final Review Project

Questions 38

AP Statistics Final Review Project

Questions 38